[tor-relays] arm /flags gives unknown

[Dr. Who]

Since some months I monitored my tor instance via this one liner:

echo "/info" | /usr/bin/arm -p | /bin/grep flags

but it seems after updating to 0.2.7.6 it only gives my unknown as result.

Has something changed the communication between tor and arm? Even
manually I can only get this answer:

>>> /info
TeamTardis (330CD3DB6AD266DC70CDB512B036957D03D9BC59)
address: 185.100.84.212:443 (ro)
published: 06:28:21 2016-01-20
os: Linux
version: 0.2.7.6
flags: unknown
exit policy: reject 1-65535
contact: Team Tardis <drwho at posteo.is>